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Analog Devices Inc./Maxim Integrated TMC2226-SA
- Part No.:
- TMC2226-SA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
TMC2226-SA.pdf
- Description:
- STEPPER MOTOR DRIVER IC, 4.75-29
- Quantity:
- Payment:
- Shipping:
Inventory:273
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Product details
Overview
TMC2226-SA from TRINAMIC Motion Control GmbH & Co. KG is an integrated stepper motor driver IC for two-phase bipolar stepper motors, delivering up to 2.8A peak coil current (2A RMS) across a 4.75–29V DC supply, featuring StealthChop2™ for silent operation, SpreadCycle™ for high-dynamic motion, and StallGuard4™ for sensorless load/stall detection - deployed in 3D printers, CCTV pan-tilt mechanisms, and battery-powered office automation equipment.
For engineers reviewing the TMC2226-SA datasheet, TMC2226-SA pinout, TMC2226-SA application, or TMC2226-SA equivalent, this page delivers verified technical context, microstepping configuration options (8/16/32/64 via pins or 256 via MicroPlyer™), UART-based diagnostics, CoolStep™ adaptive current control, and HTSSOP28 thermal performance data - all grounded in Rev. 1.10 (2023-FEB-16) official documentation.
Technical Context
The TMC2226-SA implements dual chopper modes: StealthChop2™ (voltage-mode, auto-tuned, zero-noise standstill) and SpreadCycle™ (current-mode, cycle-by-cycle regulation), both configurable via SPREAD pin or UART. It integrates full H-bridges with 170mΩ typical RDS(on) per MOSFET and supports internal sense resistors to eliminate external sensing components.
Its STEP/DIR interface accepts rising or dual-edge step pulses, while the internal 256-microstep sequencer interpolates lower-resolution inputs (e.g., fullstep → 256 µstep). StallGuard4™ provides real-time back-EMF-based load measurement used by CoolStep™ to dynamically scale motor current - reducing power dissipation by up to 75% without torque loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75–29V DC - supports wide-range industrial and battery-operated systems without external DC-DC conversion. |
| Max Coil Current | 2.8A peak / 2A RMS - enables direct drive of NEMA17/NEMA23 motors without external heatsinking in HTSSOP28 package. |
| Microstepping | Hardware-selectable 8/16/32/64; software-enabled 256 via MicroPlyer™ - eliminates need for external interpolation logic. |
| Chopper Modes | StealthChop2™ (silent low-speed) + SpreadCycle™ (high-dynamic) - selectable per application phase or combined for hybrid performance. |
| Sense Architecture | External sense resistors or internal Rsense option - removes 2× external 0.1Ω resistors, simplifying BOM and layout. |
| Diagnostic Interface | Single-wire UART with CRC - enables full register access, OTP programming, stall detection reporting, and thermal monitoring without additional pins. |
| Thermal Package | HTSSOP28 (9.7 × 6.4 mm²) with exposed die pad - achieves 40°C/W θJA (typ.) when properly mounted to GND plane with ≥6 vias. |
Pinout & Package
Package: HTSSOP28 (9.7 × 6.4 mm², 0.65 mm pitch), thermally optimized with exposed die pad connected to GND plane for enhanced heat dissipation and optical inspection compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OA1, OA2, OB1, OB2 | Motor coil A/B H-bridge outputs | Drive bipolar stepper windings directly; each pair forms full bridge with 170mΩ RDS(on) (25°C). |
| ENN | Enable-not input | High = motor outputs disabled (floating); required for safe power-down sequencing and error recovery. |
| STEP / DIR | Step pulse and direction control | Supports rising- or dual-edge STEP; DIR state sampled on active edge determines rotation direction. |
| SPREAD | Chopper mode select | Low = StealthChop2™ (quiet), High = SpreadCycle™ (dynamic); may be left unconnected for default StealthChop2™. |
| PDN_UART | Power-down control / UART I/O | Pull-low enables automatic standstill current reduction; functions as bidirectional UART when configured via register. |
| VREF | Analog current reference | Sets motor run current (IRUN) when external sense resistors used; serves as reference for internal Rsense mode. |
| DIAG / INDEX | Open-drain diagnostic outputs | DIAG asserts high on stall or fault; INDEX pulses once per electrical rotation (4 fullsteps) for homing alignment. |
| MS1_AD0 / MS2_AD1 | Microstep resolution config | Hardwired pins set 1/8, 1/16, 1/32, or 1/64 microstepping; UART overrides for 1/256 via MicroPlyer™. |
Key Features
| Feature | Design Value |
|---|---|
| StealthChop2™ | Auto-tuned voltage chopper eliminating audible noise at standstill and low speeds - no configuration required, learns during first motion. |
| SpreadCycle™ | Current-regulated chopper enabling high acceleration/deceleration and resonance suppression across full speed range. |
| StallGuard4™ | Real-time back-EMF-based load measurement - enables sensorless homing, overload warning, and CoolStep™ current adaptation. |
| CoolStep™ | Dynamically reduces motor current based on StallGuard4™ load feedback - cuts power dissipation up to 75% while maintaining torque. |
| Internal Sense Resistors | Eliminates need for external 0.1Ω sense resistors - reduces PCB area, BOM count, and thermal stress on sense traces. |
Applications
| 3D Printer Motion Control | CCTV Pan-Tilt Mechanism |
|---|---|
Use Scenario: Precise layer positioning and extruder movement in FDM printers with minimal vibration-induced layer artifacts. IC Role / Device Role / Timing Role: Primary stepper driver executing STEP/DIR commands with 256 µstep interpolation and StallGuard4™-assisted nozzle collision detection. Use Value: StealthChop2™ eliminates print-head noise during slow travel moves; CoolStep™ reduces motor heating during long idle periods between layers. | Use Scenario: Smooth, silent horizontal/vertical positioning of security camera modules in indoor/outdoor enclosures. IC Role / Device Role / Timing Role: Dual-axis stepper driver with independent SpreadCycle™ tuning per axis to handle variable mechanical load and wind resistance. Use Value: SpreadCycle™ ensures jitter-free motion at high slew rates; automatic standstill current reduction meets IP66-rated enclosure thermal limits. |
| Battery-Powered POS Terminal | Office Document Feeder |
Use Scenario: Low-power paper feed and receipt dispensing in portable point-of-sale terminals powered by Li-ion batteries. IC Role / Device Role / Timing Role: Standalone STEP/DIR driver using internal 5V regulator (5VOUT) and UART-configured CoolStep™ for adaptive current scaling. Use Value: 75% power reduction during standby extends battery life; low-RDS(on) MOSFETs minimize voltage drop across 12V supply rail. | Use Scenario: Reliable sheet separation and transport in compact multifunction printers with space-constrained feeder assemblies. IC Role / Device Role / Timing Role: Compact HTSSOP28 driver enabling direct integration into feeder PCB with minimal external components. Use Value: Internal sense resistors eliminate 4× external SMD resistors; thermally optimized package sustains continuous 1.5A RMS in enclosed plastic housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMC2209-SA | Lower max current (2.0A RMS), identical chopper algorithms and UART interface, smaller HTSSOP24 package. | Better suited for NEMA14/NEMA17 in space-constrained consumer devices where 2A suffices. | Select TMC2209-SA when board area is critical and peak motor current ≤2A; retains StealthChop2™ and CoolStep™ feature parity. |
| DRV8825PWPR | No integrated UART, no StallGuard/CoolStep, fixed 1/32 microstepping, higher RDS(on) (350mΩ), requires external sense resistors. | Targeted at cost-sensitive legacy designs lacking diagnostics or adaptive current control. | Choose DRV8825PWPR only for simple STEP/DIR-only systems where firmware-level tuning and stall detection are unnecessary. |
Compared with TMC2226-SA, TMC2209-SA offers identical intelligence in a smaller footprint but lower current capability, while DRV8825PWPR provides basic stepping functionality without embedded diagnostics or energy optimization - making TMC2226-SA the optimal choice for noise-sensitive, thermally constrained, or battery-powered precision motion systems requiring full configurability.
Availability
TMC2226-SA is available at Aetrix Electronics and suitable for 3D printer motion control, CCTV pan-tilt mechanisms, and battery-powered POS terminals requiring stable component supply, consistent HTSSOP28 packaging, and long-term production support.
Supply support for TMC2226-SA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
TRINAMIC Motion Control GmbH & Co. KG is a German semiconductor company specializing in high-precision motion control ICs, founded in Hamburg in 1997 and acquired by Maxim Integrated (now part of Analog Devices) in 2021.
The TMC22xx product line targets cost-effective, ultra-silent stepper motor replacement in consumer, industrial, and embedded systems - designed specifically to upgrade legacy drivers with StealthChop™ technology, integrated power stages, and sensorless intelligence without board redesign.
FAQ
What is the maximum motor current supported by the TMC2226-SA?
The TMC2226-SA supports up to 2.8A peak coil current and 2A RMS continuous current per phase. This rating assumes proper PCB thermal design - including connection of the exposed die pad to a solid GND plane with ≥6 thermal vias and adequate copper area - as specified in Section 20.3 of the Rev. 1.10 datasheet. Exceeding 2A RMS without thermal derating risks thermal shutdown.
Does the TMC2226-SA require external sense resistors?
No, the TMC2226-SA supports internal sense resistors, eliminating the need for external 0.1Ω components. When BRA and BRB pins are tied to GND, the device uses its integrated Rsense architecture - confirmed in Section 10 and Figure 3.2 of the datasheet. External resistors remain optional for applications demanding highest current accuracy or higher than 2A RMS operation.
How does StealthChop2™ differ from standard chopper modes in the TMC2226-SA?
StealthChop2™ is a voltage-mode chopper that automatically tunes itself during initial motion, delivering silent operation at standstill and low speeds without manual configuration. Unlike conventional current choppers, it avoids audible coil whine and mechanical resonance - a key differentiator validated in Section 6 and Figure 1.3 of the TMC2226-SA datasheet. It operates independently of SpreadCycle™ but can be combined with it for hybrid performance.
Can the TMC2226-SA operate without a microcontroller?
Yes, the TMC2226-SA supports standalone operation using STEP/DIR signals alone, with microstepping resolution set via MS1/MS2 pins and chopper mode selected via SPREAD pin. Its internal 5V regulator (5VOUT), integrated step pulse generator, and automatic standstill current reduction (via PDN_UART) enable fully autonomous motion - as detailed in Option 1 of Section 1.3.1 and Figure 1.2 of the datasheet.
What protection features are built into the TMC2226-SA?
The TMC2226-SA includes overtemperature shutdown, short-circuit detection on all outputs, open-load diagnostics, undervoltage lockout, and automatic thermal foldback. These protections are hardware-enforced and reported via the DIAG pin or UART status registers - documented in Sections 15.1–15.4 and Table 19 of the datasheet. No external circuitry is required to activate these safeguards.
TMC2226-SA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- StealthChop™
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- -
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- -
- Interface:
- Step/Direction, UART
- Technology:
- -
- Step Resolution:
- 1 ~ 1/256
- Applications:
- General Purpose
- Current - Output:
- 2A
- Voltage - Supply:
- 5V ~ 28V
- Voltage - Load:
- 5V ~ 29V
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
TMC2226-SA FAQ
1.How can I place an order for TMC2226-SA through Aetrix?
Please submit a Request for Quotation (RFQ) for TMC2226-SA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TMC2226-SA reliable?
The price and inventory of TMC2226-SA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMC2226-SA is usually 5 days.
3.What payment methods are accepted for TMC2226-SA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMC2226-SA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMC2226-SA?
TMC2226-SA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMC2226-SA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TMC2226-SA?
For technical support, including TMC2226-SA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMC2226-SA requirements.
6.How does Aetrix verify that TMC2226-SA is sourced from the original manufacturer or authorized distributors?
All TMC2226-SA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMC2226-SA meets industry standards.
7.What is the process for return or replacement of TMC2226-SA?
All TMC2226-SA units undergo pre-shipment inspection (PSI). If there is an issue with TMC2226-SA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TMC2226-SA part is unused and in its original packaging.
Return procedure for TMC2226-SA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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